Thanks a lot for the clarification. I just find it very bizarre that if you run a=0.1*(1:9);which(a==0.4) it returns the right answer. Anyway, I will pay attention next time. Thanks a lot.
> Date: Mon, 19 Mar 2012 08:59:59 +0100 > From: rainer.schuerm...@gmx.net > Subject: Re: [R] a very simple question > To: ldjst...@hotmail.com; r-help@r-project.org > > As to the reasons, David as given you the necessary hints. > > In order to get around the issue, here is what I do: > > > a <- round( 0.1 * ( 1:9 ), 1 ) > > a > [1] 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 > > which( a == 0.3 ) > [1] 3 > > Rgds, > Rainer > > > -------- Original-Nachricht -------- > > Datum: Sun, 18 Mar 2012 21:43:54 +0000 > > Von: Dajiang Liu <ldjst...@hotmail.com> > > An: r-help@r-project.org > > Betreff: [R] a very simple question > > > > > Dear All, > > I have a seemingly very simple question, but I just cannot figure out the > > answer. I attempted to run the following:a=0.1*(1:9);which(a==0.3);it > > returns integer(0). But obviously, the third element of a is equal to 0.3. > > I must have missed something. Can someone kindly explain why? Thanks a > > lot. > > Regards,Dajiang > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > > http://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > -- > ------- > > Gentoo Linux with KDE > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
